原创 Mbed升级到了v112

昨天Mbed升级到了v112，终于修正了STM32F0上存在很久的时钟的bug。

v112主要的更新有：
- new platforms - STM32 B96B F446, MOTE_L152RC
- nrf51 - fix serial init bug (character sent)
- stm all devices - fix RTC clocking in the init
- stm f0 - SystemInit clock fix, for SetVector()
- RawSerial - fix for microlib (vsnprintf with size 0)


详情请见：https://developer.mbed.org/users/mbed_official/code/mbed/rev/6f327212ef96